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1. WO2005029484 - HIGH DENSITY READABLE ONLY OPTICAL DISC AND METHOD OF PREPARING THE SAME

Publication Number WO/2005/029484
Publication Date 31.03.2005
International Application No. PCT/KR2004/002426
International Filing Date 22.09.2004
IPC
B32B 3/02 2006.1
BPERFORMING OPERATIONS; TRANSPORTING
32LAYERED PRODUCTS
BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
3Layered products essentially comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products essentially having particular features of form
02characterised by features of form at particular places, e.g. in edge regions
G11B 7/24 2006.1
GPHYSICS
11INFORMATION STORAGE
BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
7Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation, reproducing using an optical beam at lower power; Record carriers therefor
24Record carriers characterised by shape, structure or physical properties, or by the selection of the material 
CPC
G11B 7/1387
GPHYSICS
11INFORMATION STORAGE
BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
7Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation ; by modifying optical properties or the physical structure; , reproducing using an optical beam at lower power ; by sensing optical properties; Record carriers therefor
12Heads, e.g. forming of the optical beam spot or modulation of the optical beam
135Means for guiding the beam from the source to the record carrier or from the record carrier to the detector
1387using the near-field effect
G11B 7/24085
GPHYSICS
11INFORMATION STORAGE
BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
7Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation ; by modifying optical properties or the physical structure; , reproducing using an optical beam at lower power ; by sensing optical properties; Record carriers therefor
24Record carriers characterised by shape, structure or physical properties, or by the selection of the material
2407Tracks or pits; Shape, structure or physical properties thereof
24085Pits
G11B 7/243
GPHYSICS
11INFORMATION STORAGE
BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
7Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation ; by modifying optical properties or the physical structure; , reproducing using an optical beam at lower power ; by sensing optical properties; Record carriers therefor
24Record carriers characterised by shape, structure or physical properties, or by the selection of the material
241characterised by the selection of the material
242of recording layers
243comprising inorganic materials only, e.g. ablative layers
G11B 7/258
GPHYSICS
11INFORMATION STORAGE
BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
7Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation ; by modifying optical properties or the physical structure; , reproducing using an optical beam at lower power ; by sensing optical properties; Record carriers therefor
24Record carriers characterised by shape, structure or physical properties, or by the selection of the material
241characterised by the selection of the material
252of layers other than recording layers
258of reflective layers
G11B 7/26
GPHYSICS
11INFORMATION STORAGE
BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
7Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation ; by modifying optical properties or the physical structure; , reproducing using an optical beam at lower power ; by sensing optical properties; Record carriers therefor
24Record carriers characterised by shape, structure or physical properties, or by the selection of the material
26Apparatus or processes specially adapted for the manufacture of record carriers
Y10T 428/21
YSECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
10TECHNICAL SUBJECTS COVERED BY FORMER USPC
TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
428Stock material or miscellaneous articles
21Circular sheet or circular blank
Applicants
  • SAMSUNG ELECTRONICS CO., LTD. [KR]/[KR]
Inventors
  • KIM, Hyun-Ki
  • KIM, Joo-Ho
  • YOON, Du-Seop
  • HWANG, In-Oh
Agents
  • LEE, Young-Pil
  • Y.P. LEE, MOCK & PARTNERS
Priority Data
10-2003-006553422.09.2003KR
Publication Language English (en)
Filing Language English (EN)
Designated States
Title
(EN) HIGH DENSITY READABLE ONLY OPTICAL DISC AND METHOD OF PREPARING THE SAME
(FR) DISQUE OPTIQUE HAUTE DENSITE NON INSCRIPTIBLE ET PROCEDE DE PREPARATION
Abstract
(EN) Regarding many media developed recently, the biggest issue is capacity. A high density readable only optical disc includes a substrate having pits with different lengths in accordance with unit information, wherein a depth of the pit increases as the pit length increases; and a mask layer that includes a metal oxide, or a mixture of fine metal particles and a dielectric material. The high density readable only optical disc may be used to read pits not greater than a reading resolution limit and to obtain an optimal CNR since a pit depth is varied depending on a pit length. Also, a method of the high density readable only optical disc may be used to prepare a high density readable only optical disc having an optimal pit depth in accordance with a pit length.
(FR) Pour de nombreux supports mis au point récemment, le point le plus important à résoudre reste la capacité. La présente invention concerne un disque optique haute densité non inscriptible qui comprend : un substrat dont les cuvettes possèdent des longueurs différentes conformément à des informations d'unité, la profondeur d'une cuvette augmentant proportionnellement à sa longueur ; et une couche de masque comprenant un oxyde métallique ou un mélange de fines particules métalliques et d'un matériau diélectrique. Le disque optique haute densité non inscriptible de l'invention peut être utilisé pour lire des cuvettes ne dépassant pas une limite de résolution de lecture et pour obtenir un indice composite de bruit optimal, étant donné que la profondeur de la cuvette varie en fonction de sa longueur. L'invention porte également sur un procédé de préparation de disque optique haute densité non inscriptible qui permet d'obtenir un disque optique haute densité non inscriptible dont la profondeur de cuvette est optimale par rapport à sa longueur.
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